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Vishay's New WSH2818 5-Watt Surface-Mount Power Metal Strip® Resistor Is First Such Device in Compact 2818 Package Size
Resistor Combines 5-Watt Rating with Resistance Range of 1 Milliohm to 100 Milliohms
MALVERN, PENNSYLVANIA — February 10, 2006 — Vishay Intertechnology, Inc. (NYSE: VSH) today announced a new 5-watt Power Metal Strip® resistor that is the industry's first such device to offer 5-watt capability in the small 2818 package size. The new surface-mount Power Metal Strip resistor, in a package measuring 0.280 in. by 0.180 in. by 0.032 in. [7.1 mm by 4.6 mm by 0.813 mm], also features very low resistance values ranging from 1 milliohm to 100 milliohms.
Designed for use in current sensing, voltage division, and pulse applications, the new WSH2818 resistor is intended for use in dc-to-dc conversion and VRMs in desktop and notebook computers; electronic controls in automotive systems; base station power supplies in telecom systems; lithium-ion battery protection and battery charging systems in notebook computers and consumer electronics; and motor controls for industrial systems.
The Vishay Dale WSH2818 resistor features a proprietary construction with improved thermal management to enable a 5-watt power rating in a small package size that maintains the superior electrical performance of the Power Metal Strip construction. As a result, designers are able to incorporate the WSH2818 resistor in place of larger surface-mount components to realize significant board-space savings and enable manufacture of smaller, lighter end products. Alternatively, the designer can use one WSH2818resistor as a space- and cost-conserving replacement for multiple discrete resistors featuring lower power ratings.
The device's surface-mount construction enhances flexibility in the design of smaller and more robust electronics. For example, the WSH2818 resistor can be used as a 5-watt alternative to a though-hole current-sensing resistor, reducing manufacturing and placement costs by allowing for total solder reflow board assembly and eliminating the need for secondary lead forming and trimming operations.
In addition to a power rating of 5 watts, the Vishay Dale WSH2818 offers low inductance values (<5 nH), excellent frequency response, and low thermal EMF. Rated for an operating temperature range of –65 °C to +170 °C, the WSH2818 is capable of higher temperature performance than devices built with thin film or thick film resistor technologies. The new device is RoHS compliant and lead (Pb)-free, featuring terminals with a 100% matte tin (Sn) finish over a nickel (Ni) barrier. The WSH2818's all welded metal construction includes a low TCR (<20ppm/°C) nickel-chrome or manganese-copper alloy resistive element.
The WSH2818 is available in tape-and-reel packaging. Samples and production quantities of the new resistor are available now, with a lead time of eight to ten weeks for larger orders.
Vishay Intertechnology, Inc., a Fortune 1000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers
of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors,
and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial,
computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay’s product
innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader. Vishay can
be found on the Internet at www.vishay.com.
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